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Dissertations / Theses on the topic 'Proton exchange membrane (PEM)'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

Lee, Heon Joong Choe Song-Yul. "Modeling and analysis of a PEM fuel cell system for a quadruped robot." Auburn, Ala, 2009. http://hdl.handle.net/10415/1786.

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2

Van, Scoy Bryan Richard. "A Mathematical Model for Hydrogen Production from a Proton Exchange Membrane Photoelectrochemical Cell." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1326217817.

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3

Cheddie, Denver Faron. "Computational modeling of intermediate temperature proton exchange membrane (PEM) fuel cells." FIU Digital Commons, 2006. http://digitalcommons.fiu.edu/etd/2124.

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A two-phase three-dimensional computational model of an intermediate temperature (120 - 190 ˚C) proton exchange membrane (PEM) fuel cell is presented. This represents the first attempt to model PEM fuel cells employing intermediate temperature membranes, in this case, phosphoric acid doped polybenzimidazole (PBI). To date, mathematical modeling of PEM fuel cells has been restricted to low temperature operation, especially to those employing Nafion® membranes; while research on PBI as an intermediate temperature membrane has been solely at the experimental level. This work is an advancement in

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4

Leonardy, Adrianus. "Non-Noble Metal Electrocatalysts for Proton Exchange Membrane Fuel Cell." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12036.

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Transition metal-nitrogen complex have shown promising electrocatalytic activity towards the oxygen reduction reaction (ORR) that can potentially replace the platinum-based electrocatalysts in fuel cell, which generally suffer from scarcity and instability issue. Iron and cobalt have been reported to posses the best electrocatalytic performance in comparison with other transition metals due to the nature of their d-electron configuration that fulfill the prerequisite strong back-bonding for the activation of oxygen molecule. Apart from the metal active centre, other factors such as catalyst su

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5

Sutherland, Richard Daniel. "Performance of different proton exchange membrane water electrolyser components / cRichard Daniel Sutherland." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9214.

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Water electrolysis is one of the first methods used to generate hydrogen and is thus not considered to be a new technology. With advances in proton exchange membrane technology and the global tendency to implement renewable energy, the technology of water electrolysis by implementation of proton exchange membrane as solid electrolyte has developed into a major field of research over the last decade. To gain an understanding of different components of the electrolyser it is best to conduct a performance analysis based on hydrogen production rates and polarisation curves. The study aim was to co

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6

Snyder, Loren E. "A feasibility study of internal evaporative cooling for proton exchange membrane fuel cells." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/3115.

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An investigation was conducted to determine the feasibility of using the technique of ultrasonic nebulization of water into the anode gas stream for evaporative cooling of a Proton Exchange Membrane (PEM) fuel cell. The basic concept of this form of internal evaporative cooling of the PEM fuel cell is to introduce finely atomized liquid water into the anode gas stream, so that the finely atomized liquid water adsorbs onto the anode and then moves to the cathode via electro-osmotic drag, where this water then evaporates into the relatively dry cathode gas stream, carrying with it the waste ther

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7

Pitia, Emmanuel Sokiri. "Composite Proton Exchange Membrane Based on Sulfonated Organic Nanoparticles." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1339277956.

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8

Hartz, Alexandra. "High Temperature Proton Exchange Membrane Fuel Cell Optimization of Flow Channel Geometry." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/301666.

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Several groups are studying and researching major factors which influence high temperature proton exchange membrane fuel cells. These factors include material type, temperature, and fuel cell lifespan. Only a few groups research the optimization of the size of the fuel channels within the fuel cell. For channel optimization, a model was created to find the optimum flow channel and rib widths. The approach used was to code the losses due to activation, concentration, and ohmic polarizations to yield the fuel cell voltage and power expected from the fuel cell itself. The model utilizes the speci

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9

Zhang, Jingxin. "Investigation of CO tolerance in proton exchange membrane fuel cells." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0708104-193007/.

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10

Alayyaf, Abdulmajeed A. "Synthesis of Two Monomers for Proton Exchange Membrane Fuel Cells (PEMFCs)." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3015.

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The overall goal of this research is to synthesize two different monomers for proton exchange membrane (PEM) Fuel Cells. Such monomers are proposed to be polymerized to improve the efficiency and compatibility of electrodes and electrolytes in PEM fuel cells. The first target is to synthesize 4-diazonium-3-fluoro PFSI zwitterionic monomer. Three steps were carried out in the lab. First one was the ammonolysis of 3-fluoro-4-nitrobenzenesulfonyl chloride. Second reaction was the bromination of Nafion monomer. The next coupling reaction, between brominated Nafion monomer and the 3-fluoro-4-nitrob

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11

Mohamed, Rhiyaad. "Synthesis and characterisation of Pt-alloy oxygen reduction electrocatalysts for low temperature PEM fuel cells." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1018586.

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This dissertation the syntheses of Pt-based binary and ternary alloy electrocatalysts using the transition metals of Co and Ni are presented. These electrocatalysts were synthesised by an impregnation-reduction procedure at high temperature whereby Pt supported on carbon, (Pt/C (40 percent), was impregnated with the various metal and mixtures thereof and reduced at high temperatures in a H2 atmosphere. The procedure was also designed in such a way so as to prevent the oxidation of the support material (carbon black) during the alloy formation. The resultant nanoparticles (9-12 nm) of Pt3Co/C,

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12

Rossi, Gianmarco. "modeling of proton exchange membrane water electrolyzer for green hydrogen production from solar energy." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Hydrogen is considered one of the means by which to store energy coming from renewable and intermittent power sources. With the growing capacity of renewable energy sources, a storage system is required to not waste energy. PEM electrolysis provides a sustainable solution for the production of hydrogen and is well suited to couple with energy sources such as solar and wind. This work reports the development of simulation software to estimate the performance of a proton exchange membrane electrolyzer working at atmospheric or low pressure conditions connected to a solar energy source. The ele

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13

Rodgers, Steven Francis. "Simulation of PEM fuel cells: validation of model and incorporation of humidity dynamics." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Rodgers_09007dcc807d8717.pdf.

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Thesis (M.S.)--Missouri University of Science and Technology, 2010.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed July 29, 2010) Includes bibliographical references (p. 64-67).

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14

Obayopo, S. O. (Surajudeen Olanrewaju). "Performance enhancement in proton exchange membrane cell - numerical modeling and optimisation." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/26247.

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Sustainable growth and development in a society requires energy supply that is efficient, affordable, readily available and, in the long term, sustainable without causing negative societal impacts, such as environmental pollution and its attendant consequences. In this respect, proton exchange membrane (PEM) fuel cells offer a promising alternative to existing conventional fossil fuel sources for transport and stationary applications due to its high efficiency, low-temperature operation, high power density, fast start-up and its portability for mobile applications. However, to fully harness th

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15

Yang, Hongjun. "Gas phase desulfurization using regenerable microfibrous entrapped metal oxide based sorbents for logistic PEM fuel cell applications." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Dissertations/YANG_HONGYUN_44.pdf.

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16

Li, Peiwen, Jeong-Pill Ki, and Hong Liu. "Analysis and optimization of current collecting systems in PEM fuel cells." SpringerOpen, 2012. http://hdl.handle.net/10150/610164.

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This paper presents analytical and experimental studies on optimization of the gas delivery and current collection system in a proton exchange membrane (PEM) fuel cell for the objective of reducing ohmic loss, thereby achieving higher power density. Specifically, the dimensions of current collection ribs as well as the rib distribution were optimized to get a maximized power density in a fuel cell. In the modeling process, the power output from a fixed area of membrane is calculated through analysis of an electrical circuit simulating the current from electrochemical reaction flowing to the cu

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17

Kim, Kihyung. "Dynamic Proton Exchange Membrane Fuel Cell System Synthesis/Design and Operation/Control Optimization under Uncertainty." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26091.

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Proton exchange membrane fuel cells (PEMFCs) are one of the leading candidates in alternative energy conversion devices for transportation, stationary, and portable power generation applications. PEMFC systems with their own fuel conversion unit typically consist of several subsystems: a fuel processing subsystem, a fuel cell stack subsystem, a work recovery-air supply subsystem, and a power electronics subsystem. Since these subsystems have different physical characteristics, their integration into a single system/subsystem level unit make the problems of dynamic system synthesis/design and o

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18

Du, Ling. "Highly Conductive Epoxy/Graphite Polymer Composite Bipolar Plates in Proton Exchange Membrane (PEM) Fuel Cells." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1202345378.

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19

Redmond, Erin Leigh. "Cathode durability in PEM fuel cells." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50330.

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Proton exchange membrane (PEM) fuel cells are competitive with other emerging technologies that are being considered for automotive transportation. Commercialization of PEM fuel cells would decrease emissions of criteria pollutants and greenhouse gases and reduce US dependence on foreign oil. However, many challenges exist that prevent this technology from being realized, including power requirements, durability, on-board fuel storage, fuel distribution, and cost. This dissertation focuses on fuel-cell durability, or more specifically catalyst stability. New techniques to comprehensively obse

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20

Alan, Dunlavy Choe Song-Yul. "Dynamic modeling of two-phase heat and vapor transfer characteristics in a gas-to-gas membrane humidifier for use in automotive PEM fuel cells." Auburn, Ala., 2009. http://hdl.handle.net/10415/1951.

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21

Harris, Daniel I. "Characterization of mass transport processes to enable PEM fuel cell start-up from low temperatures /." Online version of thesis, 2009. http://hdl.handle.net/1850/10794.

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22

Akay, Ramiz Gultekin. "Development And Characterization Of Composite Proton Exchange Membranes For Fuel Cell Applications." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609387/index.pdf.

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Intensive research on development of alternative low cost, high temperature membranes for proton exchange membrane (PEM) fuel cells is going on because of the well-known limitations of industry standard perfluoro-sulfonic acid (PFSA) membranes. To overcome these limitations such as the decrease in performance at high temperatures (&gt<br>80 0C) and high cost, non-fluorinated aromatic hydrocarbon based polymers are attractive. The objective of this study is to develop alternative membranes that possess comparable properties with PFSA membranes at a lower cost. For this purpose post-sulfonation

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23

Zhang, Dacheng. "Contribution to prognostics of proton exchange membrane fuel cells : approaches based on degradation information at multiple levels." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAT003/document.

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Dans le contexte de la transition énergétique, la pile à combustible devient l'une des sources d'énergie alternatives les plus prometteuses. Récemment, la recherche a mis l’accent sur les piles à combustible, et plus particulièrement sur celles à membrane échange de protons (Proton Exchange Membrane Fuel Cell ou Polymer Electrolyte Membrane Fuel Cell ou PEMFC) qui est l'une des meilleures candidates pour les applications stationnaires et transport. Même si cette technologie évolue constamment, elle n'est pas encore prête pour un déploiement industriel à grande échelle en raison de sa durabilit

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24

Singh, Deepika. "Non-Precious Metal Electrocatalysts for the Oxygen Reduction Reaction in Proton Exchange Membrane (PEM) Fuel Cells." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397727211.

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25

Bi, Wu. "PEM fuel cell catalyst degradation mechanism and mathematical modeling." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29756.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Fuller, Thomas; Committee Co-Chair: Deng, Yulin; Committee Member: Gallivan, Martha; Committee Member: Kohl, Paul; Committee Member: Singh, Preet. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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26

Higier, Andrew Michael. "An In-Situ and Ex-Situ Investigation of Current Density Variations in a Proton Exchange Membrane Fuel Cell." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/373.

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In polymer electrolyte membrane (PEM) fuel cells one of the most important components is the flow field. The flow field distributes reactant gasses to the active area and also delivers electrons from the outer circuit so that the electrochemical reaction may be completed. Optimizing flow field design is extremely important in order to increase the overall power density of the fuel cell. It is particularly important to understand the ways in which the different portions of the flow field, namely the land and channel sections, interact with the gas diffusion layer (GDL), catalyst layer and membr

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27

DIAS, RICARDO R. "Preparacao e caracterizacao de eletrocatalisadores PtRu, PtSn, PtRuRh e PtSnRh para oxidacao direta de alcoois em celulas a combustivel tipo PEM utilizando a metodologia da reducao por alcool." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9387.

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Made available in DSpace on 2014-10-09T12:26:25Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:27Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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28

Talj, Reine. "Modélisation et commandes non linéaires du système d’air des piles à combustible type PEM (Proton Exchange Membrane)." Paris 11, 2009. http://www.theses.fr/2009PA112139.

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Le travail de thèse porte sur les systèmes d’alimentation en air des piles à combustible type PEM (Proton Exchange Membrane). Une première étape du travail a porté sur la modélisation, et consistait à réduire le modèle dynamique d’ordre 4 à un modèle plus simple d’ordre 3. Ce dernier a été validé expérimentalement avec une erreur relative moins de 5%. Le modèle réduit a été décomposé en l’interconnection de 3 sous-systèmes dont l’un est strictement passif en sortie ; et une structure de commande en cascade a été conçue. Une étude de stabilité basée sur la passivité a permis d’établir une métho

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29

Tan, Chiuan Chorng. "A new concept of regenerative proton exchange membrane fuel cell (R-‐PEMFC)." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0012.

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Les travaux précédents trouvés dans la littérature ont mis l'importance sur la pile à combustible PEM ou électrolyseur PEM. Certains articles ont étudié également la pile à combustible réversible et le système d'alimentation en hydrogène par énergie solaire en intégrant à la fois la pile à combustible et électrolyseur. Contrairement à un « Unitised regenerative fuel cell (URFC)», notre conception a un compartiment individuel pour chaque système de PEM-Fuel Cell et d'electrolyseur-PEM et nommé Quasi - URFC. Grâce à ce nouveau concept, l'objectif principal est de réduire le coût de la pile à com

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30

Bandlamudi, Vamsikrishna. "The effect of flow field design on the degradation mechanisms and long term stability of HT-PEM fuel cell." University of the Western Cape, 2018. http://hdl.handle.net/11394/6752.

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Philosophiae Doctor - PhD<br>Fuel cells are long term solution for global energy needs. In current fuel cell technologies, Proton Exchange Membrane (PEM) fuel cells are known for quick start-up and ease of operation compared to other types of fuel cells. Operating PEM fuel cells at high temperature show promising applications for stationary combined heat and power application (CHP). The high operating temperature up to 160°C allows waste heat to be recovered for co-generation or tri-generation purposes. The commercially available PEM fuel cells operating at 160⁰C can tolerate up to 3% CO

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31

Tan, Li. "AC Impedance Spectroscopy Analysis of Improved Proton Exchange Membrane Fuel Cell Performance via Direct Inlet Humidity Control." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282322171.

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32

Biradar, Mahesh B. "Design, Scale-Up, and Integration of an Ammonia Electrolytic Cell with a Proton Exchange Membrane (PEM) Fuel Cell." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1192811135.

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33

OLIVEIRA, PATRICIA da S. P. de. "Estudo de confiabilidade das células a combustível do tipo PEM produzidas no IPEN-CNEN/SP." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10627.

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Made available in DSpace on 2014-10-09T12:42:33Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:46Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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34

Andrea, Vinicius. "Estudo comparativo de desempenho e durabilidade de células a combustível do tipo PEM." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29012018-103733/.

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O objetivo desse trabalho foi investigar as relações entre a durabilidade e as diversas configurações dos componentes de uma célula a combustível do tipo PEM por meio de Testes de Durabilidade de Longa Duração. Foram comparados três tipos de geometria de fluxo, duas espessuras de membranas poliméricas e dois níveis de cargas de platina. Em diversos aspectos, a geometria de canais de fluxo do tipo serpentina se mostrou superior aos demais. Em relação às membranas, as do tipo Nafion 212 se mostraram bastante frágeis e suscetíveis ao crossover de H2, apesar de fornecerem maior potência elétrica q

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35

ANDREA, VINICIUS. "Estudos de durabilidade de conjuntos eletrodo-membrana-eletrodo (MEAs) produzidos por impressão à tela para uso em células a combustível do tipo PEM." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10514.

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Made available in DSpace on 2014-10-09T12:41:22Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:21Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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36

Nworie, Chimaroke. "Synthesis of a 4-(Trifluoromethyl)-2-Diazonium Perfluoroalkyl Benzenesuflonylimide (PFSI) Zwitterionic Monomer for Proton Exchange Membrane Fuel Cell." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2346.

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In order to achieve a more stable and highly proton conducting membrane that is also cost effective, the perfluoroalkyl benzenesulfonylimides (PFSI) polymers are proposed as electrolyte for Proton Exchange Membrane Fuel Cells. 4-(trifluoromethyl)-2-diazonium perfluoro-3, 6-dioxa-4-methyl-7-octene benzenesulfonyl imide (I) is synthesized from Nafion monomer via a 5-step schematic reaction at optimal reaction conditions. This diazonium PFSI zwitterionic monomer can be further subjected to polymerization. The loss of the diazonium N2+ functional group in the monomer is believed to form the covale

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37

Diloyan, Georgiy. "EFFECT OF MECHANICAL VIBRATION ON PLATINUM PARTICLE AGGLOMERATION AND GROWTH IN PROTON EXCHANGE MEMBRANE FUEL CELL CATALYST LAYER." Diss., Temple University Libraries, 2012. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/196550.

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Mechanical Engineering<br>Ph.D.<br>The objective of the current research is to study the effect of mechanical vibration on catalyst layer degradation via Platinum (Pt) particle agglomeration and growth in the membrane electrode assembly (MEA) of a proton exchange membrane fuel cell (PEM Fuel Cell). This study is of great importance, since many PEM fuel cells operate under a vibrating environment, such as the case of vehicular applications, and this may influence the catalyst layer degradation and fuel cell performance. Through extensive literature review, there are only few researches that hav

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Marshall, Josiah. "Synthesis of the Diazonium Zwitterionic Polymer/Monomer for Use as the Electrolyte in Polymer Electrolyte Membrane (PEM) Fuel Cells." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3968.

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My research goals are to synthesize new zwitterionic perfluorosulfonimide (PFSI) monomer/polymers. They are expected to replace traditionally used perfluorosulfonic acid (PFSA) polymers as the electrolyte in PEM fuel cells. For the PFSI monomer preparation, we designed a nine-step synthesis route. Thus far, I have successfully completed the synthesis of 4- (2-bromotetrafluoroethoxy)-benzenesulfonyl amide, 4-acetoxybenzenesulfonic acid sodium salt, and 4-chlorosulfonyl phenyl acetate. The coupling reaction of 4-(2-bromotetrafluoroethoxy)- benzenesulfonyl amide with 4-chlorosulfonyl phenyl aceta

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ROBALINHO, ERIC. "Desenvolvimento de um modelo numerico computacional aplicado a uma celula a combustivel unitaria de 144 CMsup(2) tipo PEM." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9396.

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Made available in DSpace on 2014-10-09T12:26:29Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:32Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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CARMO, MARCELO do. "Preparação, caracterização e avaliação de carbono funcionalizado para aplicações em células a combustível tipo PEM." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11601.

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Made available in DSpace on 2014-10-09T12:53:44Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:46Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

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41

SERGI, FRANCESCO. "PEM fuel cell system analysis for grid connected applications." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1298.

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L'incremento delle sorgenti ad energia rinnovabile porterà un grande cambiamento sulla rete elettrica nazionale, la quale dovrà operare in modo intelligente per gestire la fornitura di molti produttori di energia distribuita e per compensare l'imprevedibilità delle rinnovabili. Tuttavia, per poter far ciò, le reti elettriche del futuro necessitano di generatori distribuiti capaci di assicurare servizi quali l'inseguimento del carico, l'accumulo di energia, la compensazione dei disturbi e che abbiano un effetto mitigante sui picchi di carico e/o di generazione. I sistemi a celle a combustibi

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42

Weißbach, Thomas. "Blending of Proton Conducting Copolymers." Master's thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-61695.

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Highly proton conducting polymers for operation in hydrogen/oxygen proton exchange membrane fuel cells (PEMFCs) provide often a poor mechanical strength due to high water contents. To strengthen the conducting polymers, blends with different ratios of partially fluorinated sulfonic acid graft and diblock copolymers with perfluorinated polymers were prepared. To analyze the effect of the different quantities of the compounds, with regard to water sorption and proton conducting properties, membranes were prepared by dissolving the components and drop casting. Partially sulfonated poly([vinyliden

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43

Erkan, Serdar. "Synthesis Of Some Metalophthalocyanines And Their Effects On The Performance Of Pem Fuel Cells." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606494/index.pdf.

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Importance of clean, sustainable and renewable energy sources are increasing gradually because of either being environmental friendly or being alternative for fossil fuels. Hydrogen energy system will let the utilization of alternative energy sources. Fuel cells are the most suitable energy conversion devices while passing through the hydrogen economy. The cost of the fuel cell systems need to be reduced in order to achieve commercialization of these systems. One of the most important cost items is platinum which is used as catalyst both in anode and cathode sides of the proton exchange membra

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Granados-Focil, Sergio. "A new class of polyelectrolytes, poly(phenylene sulfonic acids) and its copolymers as proton exchange membranes for PEMFC’s." Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1129082182.

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Ibrahim, Faisal. "Synthesis of Diazonium (Perfluoroalkyl) Arylsulfonimide Monomers from Perfluoro (3-Oxapent-4-ene) Sulfonyl Fluoride for Proton Exchange Membrane Fuel Cell." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3034.

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Two diazonium perfluoroalkyl arylsulfonimide (PFSI) zwitterionic monomers, 4-diazonium perfluoro(3-oxapent-4-ene)benzenesulfonimide (I) and 4-(trifluoromethyl)-2-diazonium perfluoro(3-oxapent-4-ene)benzenesulfonimide (II) have been synthesized from perfluoro(3-oxapent-4-ene) sulfonyl fluoride (POPF) for proton exchange membrane fuel cells. PFSI polymers are proposed as new electrolytes due to their better thermal stability, inertness to electrochemical conditions, and lower susceptibility to oxidative degradation and dehydration. For a better integration between the electrode and the electroly

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ISIDORO, ROBERTA A. "Desempenho de membranas hibridas Nafion-TiO, e eletrocatalisadores de PtSn/C em celulas a combustivel do tipo PEM alimentadas com etanol e com Hsub(2)/CO em alta temperatura." reponame:Repositório Institucional do IPEN, 2010. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9613.

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Made available in DSpace on 2014-10-09T12:28:39Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:29Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Thampan, Tony Mathew. "Design and Development of Higher Temperature Membranes for PEM Fuel Cells." Digital WPI, 2003. https://digitalcommons.wpi.edu/etd-dissertations/293.

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Proton-Exchange Membrane (PEM) fuel cells are extremely attractive for replacing internal combustion engines in the next generation of automobiles. However, two major technical challenges remain to be resolved before PEM fuel cells become commercially successful. The first issue is that CO, produced in trace amounts in fuel reformer, severely limits the performance of the conventional platinum-based PEM fuel cell. A possible solution to the CO poisoning is higher temperature operation, as the CO adsorption and oxidation overpotential decrease considerably with increasing temperature. Howev

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von, Kraemer Sophie. "Membrane Electrode Assemblies Based on Hydrocarbon Ionomers and New Catalyst Supports for PEM Fuel Cells." Doctoral thesis, KTH, Tillämpad elektrokemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9208.

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The proton exchange membrane fuel cell (PEMFC) is a potential electrochemicalpower device for vehicles, auxiliary power units and small-scale power plants. In themembrane electrode assembly (MEA), which is the core of the PEMFC single cell,oxygen in air and hydrogen electrochemically react on separate sides of a membraneand electrical energy is generated. The main challenges of the technology are associatedwith cost and lifetime. To meet these demands, firstly, the component expensesought to be reduced. Secondly, enabling system operation at elevated temperatures,i.e. up to 120 °C, would decre

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Kern, Kimberly E. "Poly(arylene ether sulfone)s Carrying Pendant(3-sulfonated) phenyl sulfonyl Groups for use as Proton Exchange Membranes." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1308770965.

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Alrahmani, Mosab. "A numerical study on the effects of surface and geometry design on water behaviour in PEM fuel cell gas channels." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/16245.

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Water management is a serious issue that affects the performance and durability of PEM fuel cells. It is known, from previous experimental investigations, that surface wettability has influence on water behaviour and fuel cell performance. This finding has lead researchers to develop numerical tools for further investigation of the liquid water behaviour in gas channels. The Volume-of-Fluid (VOF) method has been used in a wide range of studies for its advantage of showing the multi-phase interface in a Computational Fluid Dynamics (CFD) simulation to understand liquid water behaviour in gas ch

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